Hi, i have looking for a solution everywhere without success, so i need help.

I've been using PMS like 2 years now without problems at all. Always thru ethernet.MKV, MP4, with subs, TV Series, movies, u name it...

But 3 weeks ago ive upgraded my PC to Windows 8 64x.

After that upgrade, i can stream mkv with subs just great. As u may know TV series alomost always came on MKV, so it works ok.But now all the MP4 fromat that i normally get from movies, they run ok without subs, but when i play MP4 with subs, its just impossible to watch, it gives choppy/shutter video and audio. Sometimes it stops for like 3 secs thens runs but choppy.

Do someone experienced something like this, is there any solution for this ? explanation?